Velocity measurements in jets with application to noise source modeling

Philip John Morris, K. B.M.Q. Zaman

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

This paper describes an experimental investigation of the statistical properties of turbulent velocity fluctuations in an axisymmetric jet. The focus is on those properties that are relevant to the prediction of noise. Measurements are performed using two single hot-wire anemometers as well as a two-component anemometer. Two-point cross correlations of the axial velocity fluctuations and of the fluctuations in the square of the axial velocity fluctuations are presented. Several reference locations in the jet are used including points on the jet lip and centerline. The scales of the turbulence and the convection velocity are determined, both in an overall sense as well as a function of frequency. The relationship between the second and fourth order correlations is developed and compared with the experimental data. The implications of the use of dimensional as well as non-dimensional correlations are considered. Finally, a comparison is made between the length scales deduced from the flow measurements and a RANS CFD calculation.

Original languageEnglish (US)
Pages (from-to)394-414
Number of pages21
JournalJournal of Sound and Vibration
Volume329
Issue number4
DOIs
StatePublished - Feb 15 2010

Fingerprint

velocity measurement
Velocity measurement
Anemometers
hot-wire anemometers
anemometers
flow measurement
Flow measurement
charge flow devices
cross correlation
Computational fluid dynamics
Turbulence
convection
turbulence
Wire
predictions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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Velocity measurements in jets with application to noise source modeling. / Morris, Philip John; Zaman, K. B.M.Q.

In: Journal of Sound and Vibration, Vol. 329, No. 4, 15.02.2010, p. 394-414.

Research output: Contribution to journalArticle

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